SWW's director of wastewater, Andrew Roantree said: "It is the largest discovered in our service history and will take our sewer team around eight weeks to dissect this monster in exceptionally challenging work conditions."

The Sidmouth fatberg (Image: PA)

Mr Roantree has warned the public to be more wary about what they dispose into drains.

He added: "If you keep just one new year's resolution this year, let it be not to pour fats, oil, or grease down the drain, or flush wet wipes down the loo. The consequences can be significant, including sewer flooding in your own home.